AIX

cd /home/user/
while true
do
numberoffiles=`ls |wc -l`


sleep 30
echo "comparing number of added files"
if [[ "$numberoffiles"  -lt  `ls|wc -l` ]]
then chmod 700 *
echo "chmoding files with 700 permission"
else
echo "file number not modified"
fi
done

-u OctalVal 	 
           Sets the ftpd daemon's umask. The OctalVal variable must be specified as an octal value to define the umask. The default umask is an octal value of 027, which results in file permissions of rw-r-----.